you drop this on a city. disperses a cloud. and it causes a panic unlike any other weapon. >> you mention a brokered piece that maybe assad would step down and leave. is that really a possibility? is there a chance if russia came in, he would step down? or is he going to battle until the last? >> up until this morning i thought assad was going to battle until the last, go down like gadhafi. he's got nowhere to go. this is his territory. his family has ruled the country for 42 years. he won't give it up. always the hope that something will happen. but you know russia could be the missing element here. if they're willing to come in and shift their support and pressure assad to leave and offer him a way out maybe he'll take it. it is the first glimmer of sort of a peaceful settlement that we've seen in months. >> bill: i was at the white house briefing yesterday but also it was on monday that jay carney said unequivocally that any use -- he just -- basic, put out the warning. any use of chemical weapon crosses the red line and the